Casper d



(No Model.)

0. D. WALLACE. DIE FOR MAKING TYPE WRITER TYPE BARS. No. 461,100.Patented Oct. 13,1891.

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C915. Ina 15W w a?" V UNrTnn STATES PATENT OFFICE.

CASPER D. .VALLACE, OF BROOKLYN, NE\V YORK, ASSIGNOR TO CLARENCE W.SEAMANS, ERNEST R. BARRON, AND DANIEL C. ROUNDY, OF SAME PLACE,EXECUTORS OF JAMES DENSMORE, DECEASED.

DIE FOR MAKING TYPE-WRITER TYPE-BARS SPECIFICATION forming part ofLetters latent No. 461,100, dated October 13, 1891.

Application filed March 28, 1887. Serial No. 232,723. (No model.)

To all whom it may concern: mon die and punch a, the main tapering Be itknown that I, CASPER D. VVALLAOE, body of said blank A; a, a projectionexof Brooklyn, Kings county, New York, have tended from the narrow endof said blank A; invented Improvements in Mechanism for (F, a slit orbifurcation in the projection to;

Folding Sheet-Metal Blanks and Producing a a like slit or bifurcation inthe wide end 'lherefrom Type'Bars for TypeJVriting Maof said blank A; aa projection on each side chines, of which the following is aspecificaof the bifurcation a at the wide end of said tiollblank A; of,another projection on each side The nature of the invention is in themechof and extended laterally and longitudinally IO anism for makingtype-bars for type-writing from each inner projection a at the wide endmachines out of light sheet metal; and it is of said blank A; a, acircular socket at the illustrated by the accompanying drawings narrowend of the body ct at the,completion of .and the following descriptionthereof. the type-bar, and a7 a type in the socket a of In the drawings,Figure 1 represents a top the completed type-bar from said blank A.

15 view of a sheet-metal blank for a type-bar in In the drawings, also,B represents a die to accordance with the invention; Fig. 2, a perfoldslightly the two straight edges of the spective View of abed-plate anddie and plunbody a of said blank A; B 2. bed-plate to ger to foldslightly the long straight edges of hold the first die B; b, a shallowlongitudinal said blank; Fig. 3, a perspective View of groove in thefirst die B, slightly narrower 20 another bed-plate and die and plungerto fold than the body a of said blank A; ('2 a key to the long straightbody 'of said blank in the fasten and hold the first die B in itsbed-plate middle on its longitudinal axis into a trough- B Uta recess inthe narrow end of the groove like hollow bar; Fig. i, a sectional Viewof b of the first die B; C, a plunger to work in the second bed-plateand die and of the inthe groove 1) of the first die B, and c a protu- 25 closing case, spiral springs, and holdingberance on the narrow end ofthe first plunblade; Fig. 5, a perspective view of another ger C to workin the recess b of the groove 1) bed-plate and die and plunger andworking of the first die B. lovers to fold the hollow trough-like barinto In the drawings, also, D represents a die in a tubular form and tofold the bifurcated protwo parts to fold the body a of said blank A 0jection from the narrow end into a circular into a narrow bar with atrough-like hollow 8o socket; Fig. 6, a top view of the thirdbedlongitudinally through it; D a bed-plate to plate and die andplunger; Fig. 7, a top view hold the two parts of the second die D; (Z,a of said blank after the first folding, after series of screw-bolts tofasten the second die folding the long straight edges slightly; Fig. Dto its bed-plate D The screw-bolts pass 3 5 8,a side and sectional viewof said blank after through holes larger than the bolt-bodies to 8 5 thesecond folding, after folding it in the allow the die to beadjusted toposition. (1', is middle on its longitudinal axis into a hollow aset-screw extending laterally through each trough-like bar; Fig. 9, aperspective view of end of each shoulder of the second die D to saidblank or bar after the third and final adjust the die to position; (Zaspace or open- 40 folding, after folding it into tubular form; ingbetween the two parts of the second die Fig. 10, a side and sectionalView of the tubu- D; E, a round vertical case or tube attached lartype-bar with its type in place; Fig. 11, a to the bottom of the secondbed-plate D at perspective and sectional view of the hollow each end ofand across the opening d be trough-like bar after only two foldings,after tween the two parts of the second die D; E

5 one folding of the body of said blank and aspiral spring within eachcase E; E ,aspin- 5 after folding the bifurcated projection into a dlepassing through the coil of the spiral circular socket; and Fig. 12, aView of the spring E within each case E IE a cap on holding-blade usedwith the second die. the bottom of each case E; e, a collar on each Inthe drawings, also, Arepresents a sheetend of each spindle E and againstthe spring 50 metal blank, in form desired, made by a com- E each upperone tight on the spindle and I00 each lower one loose and resting on itsre-- spective case-cap E 6 a slot through the upper end of each spindleE a a stiff blade on' the two spindles E within the slots 6 to work upand down in the opening (Z between the two parts of the second die D,and e a hollow set-screw up against each loose collar 6 within eachcase-cap E to regulate the tensions of the springs E and thereby that ofthe stifi blade a In the drawings, also, G represents two side plates; Ga bed-plate on and across the two side plates G; H, a die or pair ofdies in a lateral groove in the front part of the bed-plate G to foldthe hollow bar a of said blank A into a tubular form; h, a wearingshoulder or r 1 a cam on each end of the axle I to work against thecontiguous part of the die H; K, a lever attached to the cam-axle I towork up and down between the side platesG under the bed-plate G K ahandle on the outer end of the cam-lever K; L, a plunger in a 1011-gitudinal groove in the rear part of the bedplate G Z, a circular slotvertically through the front end of the plunger L; m, a link pivoted tothe rear end of the plunger L; m a forked support attached near thebottom to the bed-frame G directly under the upper link on; M, avertical lever hinged to said support m and pivoted to the upper link mat the rear'of the bed-frame G G n, a vertical pin in the top of thebed-plate G on each side of the longitudinal groove of the plunger L andin rear of the groove of the die H; M, a like pin in the top of eachpart of the die H, and N a stiff spring-wire looped around each rear pin72, wit-h a loose end pressed against the inner side of each front pin mThe operation of the invention may be described as follows: Thesheet-metal blank A is made by a common die and punch, an old andfamiliar device, and the term blank in this specification means a fiatthin piece of metal, of any desired form, cut out of a larger sheet ofsuch metal by a common die and punch. Then to' form said blank A into atubular type-bar the first operation is to lay it on the first die Blongitudinally over its groove b, drive the plunger 0 against it, forcethe body ainto the groove, and thus fold the long straight edgesslightly, as shown in Fig. 7. The second operation is to lay said blankA, thus slightly folded, on the second die D longitudinally over theopening d and blade 6 therein, drive the second plunger F against it,force the body a into the opening, and thus fold it into a trough-likehollow bar, as shown in Fig. 8. The function of the blade 6 with thesprings E under it, comfirmly and securely in position, and the thirdhollow bar with its edges slightly folded inwardly on the thirdbed-plate G between the two parts of the third die H, drive the twoparts of said die together, force the body a close int-o the groove hand thus fully fold it into the round or elliptical tubular bar, asshown in Figs. 9 and 10.

In the'last operation at the same time that the two parts of the thirddie H are driven together drive the third plunger F against the narrowend of the body a, force the bifurcated projection of into the circularslot Z, and thus fold the two parts into the round socket a, as shown inFig. 9.

- The first and second operations are better done with the aid of apower-press; but the third operation can be done conveniently by hand.With one hand lift the cam-lever K K which will turn the axle I and camsI and thereby drive together the two parts of the third die H, force thebody a into the groove 71 andthus fold it into tubular form, and withthe other hand at the same time pull forward the vertical lever M, whichwill drive the third plunger L against the end of the bar a, and therebyforce the two parts of the bifurcated projection ct into the circularslot Z and thus fold them into the socket (1. Then reverse thesemovements, push the vertical lever M back to place, which will draw thethird plunger L with it, drop the cam-lelike hollow type-bar, the firstoperation herein described is dispensed with, and what is herein calledthe second operation becomes the first, and the third becomes thesecond, which latter in that case is confined simply to folding thetwo'parts of the bifurcated projection a of the bodya into the socket a.Simply, in that case, the first die and plunger B C and first operationherein described are not used, and the second die and plunger D F becomethe first, and the third die and plunger G L, modified to therequirements, become the second, which are all that are needed.

And now, having thus fully described the invention I claim 1. For themanufacture of type-writing-maing resting on springs so as to make atight vise with the plunger and yet to yield to the greater force of thelatter.

3. For the manufacture of type-Writing-machine type-bars, thecombination of a die in two parallel parts adapted to move laterally andprovided With an elliptical or circular groove longitudinally in theinner edges thereof, half in one and half in the other, a

IO plunger adapted to move in the line of such groove and provided withavertical. circular groove in the working end thereof, cams andmechanism to drive the die parts together to form a blank, and mechanismto press them apart when released.

Brooklyn, New York, March 17, 1887.

CASPER D. XVALLACE. lVitnesses' WILLIAM H. BRIGGS, HARRY W. CoLLoM,

